Abstract Nano-grained pure titanium was produced using two-step severe plastic deformation. The nano-grained pure titanium exhibits an excellent mechanical properties that are comparable or even higher than the equivalent properties of conventional Ti-6Al-4V alloy. A significant fraction of nano-scale grains and non-equilibrium grain boundaries appears to enable deformation by grain boundary sliding, which promotes an increase in ductility of the nano-grained pure titanium. The strength improvement is derived from the grain refinement.

中文翻译：

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两步剧烈塑性变形加工纳米晶粒钛的强度和延展性增强

摘要 采用两步剧烈塑性变形制备纳米晶粒纯钛。纳米晶粒的纯钛表现出优异的机械性能，可与常规Ti-6Al-4V合金的等效性能相媲美甚至更高。相当一部分纳米级晶粒和非平衡晶界似乎能够通过晶界滑动变形，从而促进纳米晶纯钛的延展性增加。强度的提高源于晶粒细化。